package org.soarsky.wealthchengdu.tools;

import java.security.MessageDigest;

public class Tools {

	private static MessageDigest md5 = null;
	public static String md5(String inStr) {
		if (md5 == null)
			try {
				md5 = MessageDigest.getInstance("MD5");
			} catch (Exception e) {

				e.printStackTrace();
				return null;
			}
		char[] charArray = inStr.toCharArray();

		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; i++)
			byteArray[i] = (byte) charArray[i];

		byte[] md5Bytes = md5.digest(byteArray);

		StringBuffer hexValue = new StringBuffer();

		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;// 转为16进制
			if (val < 16)
				hexValue.append("0"); // 两位一组
			hexValue.append(Integer.toHexString(val));
		}

		return hexValue.toString();
	}
	// 可逆的加密算法
	public static String KL(String inStr) {
		// String s = new String(inStr);
		char[] a = inStr.toCharArray();
		for (int i = 0; i < a.length; i++) {
			a[i] = (char) (a[i] ^ 't');
		}
		String s = new String(a);
		return s;
	}

	// 加密后解密
	public static String JM(String inStr) {
		char[] a = inStr.toCharArray();
		for (int i = 0; i < a.length; i++) {
			a[i] = (char) (a[i] ^ 't');
		}
		String k = new String(a);
		return k;
	}
}
